Machine for forming and fastening rivets or clamps.



N0. 68l,709. Patented Sept. 3, I90I. F. KAULFERSCH. MACHINE FOR FORMING AND FASTENING BIVETS OR CLAMPS;

(Application filed Dec. 10, 1900.) (No Model.)

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Patented Sept. 3, l90l. F. KAULFERSGH.

MACHINE FOR FORMING AND FASTENING RIVETS 0R CLAMPS.

(Application filed Dec. 10. 1900.) (No Model.) 2 SheetsSheet 2.

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FRANZ KAULFERSCH, OF BAUTZEN, GERMANY.

MACHINE FOR FORMING AND FASTENING RIVETS OR CLAMPS.-

SPEUIFICATION formingpartof Letters Eatent No. 681,709, dated September 3, 1901.

Application filedDeccmber 10,1900. Serial No. 39,430. (No modelJ To all whom it may concern:

Be it known that I, FRANZ KAULFERSCH, a subject of the Emperor of Austria-Hungary, residing at Bautzen, Kingdom of Saxony, Germany, have invented a certain new and Improved Machine for Forming and Fastening Rivets or Clamps, of which the following is a full, clear, and exact description.

The presentinvention consists of a machine for forming and fastening rivets or clamps, and relates more especially to the class of machines used in connection with the making of pasteboard boxes and the like.

The invention comprises the details of construction hereinafter set forth, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar letters of reference denote similar parts th roughout the several views.

Figure 1 is a side elevation of the machine; Fig. 2, a front elevation; Fig. 3, an enlarged part section of the stamp and metal-feed device; Fig. 4:, a part elevation showing the means for rotating the die; Fig. 5, a front elevation of the same parts. Figs. 6 and 7 are vertical sections through the double die, showing the position of the stamps in making and inserting the rivets. Fig. 8 is a plan of the metal strip from which the rivets are cut, and Fig. 9 is an enlarged view showing the rivets in position in the pasteboard.

The machine is driven by means of the beltpulley ai'rom a suitable source of power, and a coupling is interposed, actuated by a footlever a and lever system a so that when the treadle a is depressed by the operator the coupling (which may be of any suitable class) will be disengaged and the belt-pulley will run without working the machine. On the pulley-shaft a crank-disk b is mounted, connected by means of a rod 0 with one end of a double lever d, pivotally mounted in the machine-frame and having its free end coupled to the vertically-reciprocatory stamp c. Toward the lower end this stamp is provided with a shoulder, and it is adapted to move in a sleeve f, which is also mounted to reciprocate vertically in the machine-frame, being adapted to follow the downward movement of the stamp c to a certain extent. For this purpose it is normally depressed by means of the two springs a, which hold the said sleeve against the shoulder of the stamp c, Fig. 3. The sleevef carries the die at its lowerend, the said die being pivotally mounted in the sleeve and having two conical orifices therein, which are tapered in opposite directions. The strip of metal B is advantageously of the form shown in Fig. 8, so that each piece cut off the same will be in the proper shape for a rivet or clamp. This strip is guided in a guide 1, which is vertically movable in the machineframe with the sleeve f, as hereinafter explained.

The stamp e is provided with a cutter 7.: and with two stamps e and c one of which is shorter than the other. The said stamps fit into the two conical orifices of the die. At the descent of the stamps the shorter one o enters the orifice 2' of the die and forms the rivet therein, Fig. 7, while the longer one o forces the rivet or clamp previously formed down through the orifice 2" into the pasteboard lying underneath the same on the anvilA. The rotary die g is mounted on the pivot-spindle n, and each time the stamp rises it is turned over, so as to bring the orifice containing the rivet N into position under the longer of the two stamps e'icl est, from the position shown at Fig. (3 to that in Fig. 7. Thus at each descent of the stamp one rivet or clamp will be formed in the orifice i by.

the stamp e and the rivet formed by the pre vious descent will be driven into the paste board or other material by the stamp e, the die having been turned over in the meantime by the following mechanism: Fast on the spindle n of the die 9 is a pinion 0, which engages with a gear 19, mounted on a stub-shaft r, fixed in the movable part of the machine advantageously the sleeve f. Rigidly fixed to the gear 10 is a ratchet-wheel q, and a detent-pawl w prevents the same from being turned back. A disk 3 is loosely mounted on the spindle r and carries a spring-pressed pawl c, which engages in the said ratchetwheel g. This disk is linked to an arm 25, pivotally suspended 011 a stationary part of the machine. A spring-pressed finger m rests on the strip of metal B. The operation of this part of the machine takes place in the following manner: When the stamp e descends, the

sleeve f will be forced down with it by the springs u until the die 9 rests on the pasteboard lying on the anvil A. Then the stamps e and 6 continue their downward movement and enter the orifices of the die g, making and fastening the rivets, as previously explained. After this has taken place the stamps rise again until the shoulder of the stamp e lifts the sleeve f against the action of its springs. The metal-strip guide rises with the sleeve and passes up the metal strip, which is held by the finger, so that the end of the said strip will be projected out of the guide under the stamp 6 Fig. 6. As the sleevef rises the arm 2? partially rotates the disk 3, and this disk rotates the ratchet-wheel g. This movement of the ratchet-wheel is trans mitted to the pinion "n of the die g, which is accordingly turned over, as will be readily understood. The metal band is mounted on a spool 11 revolubly mounted at z in the upper part of the machine-frame. The band is taken down with the guide when the latter sinks by means of the spring-pressed finger m, or, more correctly, this finger prevents the band from rising with the guide.

I claim as my invention 1. In a rivet or clamp forming and clamping machine, the combination of a verticallyreciprocatory double stamp, a rotary die having double orifice, and means for feeding a metal strip to one of the said orifices, means for differentially vertically reciprocating the said stamp and die and means for turning over the said die at each reciprocation so as to reverse the position of the die-orifices as regards the double stamp, substantially as described.

2. In a clamp forming and fastening machine, the combination of a double stamp having a longer and a shorter member, a sleeve inclosing said stamp and a die having double orifice pivotally mounted in the lower end of said sleeve, means for differentially reciprocating the said stamp and sleeve, a reciprocatory guide for the metal strip and means for moving it on the metal strip when the stamp is raised and for taking it with the guide as the latter is depressed, a cutter on the stamp and means for reversing the position of the die-orifices as regards the two members of the double stamp when the said die is raised substantially as described.

3. In a clamp'forming and riveting machine the combination of a double stamp, having a longer and a shorter member, a sleeve inclosing said stamp and having a die pivotally mounted in its lower end, a double orifice to said die to correspond with the two members of the stamp, means for feeding a strip of metal to the said die, a cutter on the stamp, a pinion on the die-spindle, a gear mounted on the said sleeve-and-ratchet mechanism in engagement with said gear, and means for operating said ratchet mechanism at each upward stroke of the sleeve to turn the gear a part of a revolution, and means for differentially reciprocating the said stamp and die sleeve substantially as described.

4. In amachine for forming and fastening clamps, the combination of a double stamp and a pivotally-supported die having two orifices to correspond with the position of the two members of the stamp, means for differentially reciprocating the said die and stamp and means for turning over the said die at each reciprocation in the manner and for the purpose substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

FRANZ KAULFERSCII. lVit-nesses:

RUD. SCHMIDT, IIERNANDO DE Soro. 

